[PATCH v4 0/3] staging: media: atomisp: use kvmalloc_objs() and drop redundant OOM messages

[Rodrigo Gobbi]

Several allocations in the atomisp driver still size their buffers with
open-coded multiplication, e.g. width * height * sizeof(*p). When the
dimensions are large the product can silently wrap, causing kvmalloc()
to allocate an undersized buffer.

Convert the remaining sites to kvmalloc_objs() with array_size(), which
saturate to SIZE_MAX on overflow so kvmalloc() returns NULL instead of
allocating too few bytes.

This continues the work started in commit [2], and picks up the stalled
sites from [1], unifying with [3].

While here, drop the redundant IA_CSS_ERROR("out of memory") messages on
the touched allocation paths: the memory management core already emits a
far more detailed warning on allocation failure as raised at [1].

[1] https://lore.kernel.org/all/20260413112904.98864-1-feng@xxxxxxxxx/
[2] d178c7ca8fef ("staging: media: atomisp: use array3_size() for overflow-safe allocation")
[3] https://lore.kernel.org/all/20260609215110.118860-1-rodrigo.gobbi.7@xxxxxxxxx/
---
Changelog:
v4: 0002: use the full commit reference form for d178c7ca8fef (Media CI checkpatch); collect Andy's Reviewed-by;
v3: https://lore.kernel.org/all/20260623221028.40238-1-rodrigo.gobbi.7@xxxxxxxxx/#t
v2: https://lore.kernel.org/all/20260622224402.34001-1-rodrigo.gobbi.7@xxxxxxxxx/
v1: https://lore.kernel.org/all/20260609215110.118860-1-rodrigo.gobbi.7@xxxxxxxxx/


Feng Ning (1):
  staging: media: atomisp: use kvmalloc_objs() for overflow-safe
    allocation

Rodrigo Gobbi (2):
  staging: media: atomisp: use kvmalloc_objs() in make_histogram()
  staging: media: atomisp: drop redundant out-of-memory messages

 .../media/atomisp/pci/sh_css_metrics.c        |  11 +-
 .../media/atomisp/pci/sh_css_param_dvs.c      |   5 -
 .../staging/media/atomisp/pci/sh_css_params.c | 101 +++++++-----------
 3 files changed, 41 insertions(+), 76 deletions(-)

-- 
2.48.1